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1. A dull red, hard, insensitive lesion that is the first manifestation of syphilis.
2. An ulcer located at the initial point of entry of a pathogen.

[French, from Old French, from Latin cancer, tumor, crab; see kar- in Indo-European roots.]

chan′crous (-krəs) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.chancrous - of or having chancres
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